JSON Formatter

It takes raw JSON and lays it out with clean indentation so you can read the structure at a glance, and it flags any syntax error. This JSON formatter parses your text, then prints it back with the spacing you choose, or squeezes it onto one line if you'd rather minify. It runs in your browser, so your data never leaves your device or hits a server.

Paste your JSON into the box and it's beautified the moment you stop typing, using the indent you pick: two spaces, four spaces, or a tab. The output shows nested objects and arrays stacked and indented, which makes a long payload far easier to scan. Hit copy to grab the tidy version, and your original text stays put in the input.

Click the minify button and the tool strips every space and line break, collapsing the JSON to the smallest valid form. That's the version you'd ship in an API response or a config file, since it saves bytes. The data is identical, just without the whitespace, so it parses exactly the same on the other end.

It runs your text through a real JSON parser, the same one your browser uses. If it parses, you'll see a valid badge; if it doesn't, you get the parser's own error message, which points at what tripped it up, like a trailing comma or a missing quote. That's usually enough to spot and fix the problem fast.

The usual culprits are a trailing comma after the last item, single quotes instead of double quotes, an unquoted key, or a stray bracket. JSON is strict about all of these, unlike JavaScript object syntax. Read the error message the tool shows, jump to that spot, and the fix is normally a quote or a comma away.

Yes to both. There's no sign-up, no size cap worth worrying about, and nothing to install, since it all runs in the page. Your JSON stays on your device and isn't sent anywhere, which matters when you're pasting in real payloads. Bookmark it and you'll have a quick, safe formatter whenever you need one.